THE COMPOUND MICROSCOPE 



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end of a piece of glass tubing, filling this bulb with 

 water, and plugging the end. This is a crude micro- 

 scope. 



The compound microscope. The compound microscope 

 is a large, more complex structure. As the diagram shows, 

 it has two sets of lenses, which make the object look larger 

 by a double magnification, first, by a glass nearer the object, 



The compound microscope makes an image A'B' nearer the eye than the object AB 

 and then magnifies it to a still larger image ab. 



or the objective, and later by a glass nearer the eye, or the 

 eyepiece. While not every boy and girl can have a mi- 

 croscope of his own, still in most schools you will find a 

 good compound microscope, and any good-natured science 

 teacher will allow you to work out a project on the con- 

 struction and use of the compound microscope. All 

 sorts of new wonders are opened to those of us who can 

 buy a small microscope for our own, as the beautiful 

 forms of the snow crystals, the life in a drop of water, the 

 structure of an insect's wings. Thousands of wonderful 



